Calculate the exponential of all elements in the input array.
Parameters : | x : array_like
|
---|---|
Returns : | out : ndarray
|
See also
Notes
The irrational number e is also known as Euler’s number. It is
approximately 2.718281, and is the base of the natural logarithm,
ln (this means that, if ,
then
. For real input, exp(x) is always positive.
For complex arguments, x = a + ib, we can write
. The first term,
, is already
known (it is the real argument, described above). The second term,
, is
, a function with magnitude
1 and a periodic phase.
References
[R18] | Wikipedia, “Exponential function”, http://en.wikipedia.org/wiki/Exponential_function |
[R19] | M. Abramovitz and I. A. Stegun, “Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables,” Dover, 1964, p. 69, http://www.math.sfu.ca/~cbm/aands/page_69.htm |
Examples